Whether you use crossfading in your favorite software media player (like iTunes) to listen to digital music, or use DJ software to create remixes from MP3s, harmonic mixing is a must for getting perfect transitions. Rather than having to know music theory and spend hours matching songs by ear, Mixed In Key could just save you heaps of time.
It works by analyzing the audio files in your library and detecting the key (sometimes called root key), tempo (BPM), and energy level. This is essential for seeing what songs work together in your collection. In fact, top DJ's and musicians use harmonic mixing in order to avoid bad sounding key clashes.
In the latest version of Mixed In Key, there's also a energy level feature which indicates how 'danceable' a track is. This is useful for predicting how an audience or crowd will react to your music.
For a full look at this software tool, read our Mixed In Key review for the full lowdown.